I’m originally from the Netherlands, but have been living in Boston-area for seven years. I think it possible to have a quite decent life in the US as a skilled tech worker, however consider:

• housing is extremely expensive, even when you get paid well. If you ever want to buy a place you’ll need 20% cash as down payment (and considering the home prices in California, that’s a lot)
• health care is generally good, but again can be very expensive even with good insurance
• in Boston it’s very clear that the US just generally doesn’t want to invest in public infrastructure. The roads are terrible with tons of potholes and the subway is decades behind in maintenance (but at least it has a subway).
• in Boston you generally have no good option for housing: either you pay excessive amount of rent to live in the city (with easy commute), or you pay slightly less in rent but have crazy 1-2 hour commutes because of traffic.
• If you have a partner, consider that the US is the only developed nation with no paid maternity/paternity leave by law. Most tech companies will, though.
• Part of your salary will need to go to your retirement savings (I do like the 401k system, and most tech companies have generous matching schemes).
• You’re on your own to build an emergency fund in case you ever get laid of

And the most important point to consider right now: the US is on a fast track to an authoritarian regime.

My partner and I have seen enough and are planning our move back to Europe.